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(X-1)(1-X)=0
We add all the numbers together, and all the variables
(X-1)(-1X+1)=0
We multiply parentheses ..
(-1X^2+X+X-1)=0
We get rid of parentheses
-1X^2+X+X-1=0
We add all the numbers together, and all the variables
-1X^2+2X-1=0
a = -1; b = 2; c = -1;
Δ = b2-4ac
Δ = 22-4·(-1)·(-1)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation
Stosujemy wzór:$X=\frac{-b}{2a}=\frac{-2}{-2}=1$
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